Abstract Achieving adhesion to materials with a low surface energy is a challenge when designing new soft adhesives. With this question in mind, waterborne poly(urethane-urea) (WPUU) dispersions based on poly(ethylene oxide) (PEO) homopolymer and poly(ethylene oxide-b-propylene oxide-b-ethylene oxide) (PEO-b-PPO-b-PEO) and poly(propylene oxide-b-ethylene oxide-b-propylene oxide) (PPO-b-PEO-b-PPO) triblock copolymers were prepared. Adhesives cast from the dispersions exhibited better adhesion on a low surface energy polypropylene (PP) probe than on a high surface energy steel probe. Moreover, with the aim of improving the adhesive performance of the WPUUs for pressure sensitive adhesive (PSA) applications, bilayer systems were designed. They were prepared using two WPUUs with differing viscoelastic behavior (one more solid-like and the other one, more liquid-like) to create a gradient in the viscoelastic properties. This strategy led to adhesive materials that exhibited fibrillation during probe tack measurements using a steel probe, which is typical of PSAs. Finally, prototype adhesive tapes were prepared from one of the bilayer systems. These adhesive tapes performed in a peel test in a similar way as a domestic commercial adhesive tape, making them interesting for that potential application.

中文翻译：

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优化水性聚（氨基甲酸乙酯-脲）在高和低表面能表面上的粘合性能

摘要 在设计新的软粘合剂时，实现对低表面能材料的粘合是一项挑战。考虑到这个问题，基于聚（环氧乙烷）（PEO）均聚物和聚（环氧乙烷-b-环氧丙烷-b-环氧乙烷）（PEO-b-PPO）的水性聚（氨酯-脲）（WPUU）分散体-b-PEO)和聚(环氧丙烷-b-环氧乙烷-b-环氧丙烷)(PPO-b-PEO-b-PPO)三嵌段共聚物。由分散体浇铸的粘合剂在低表面能聚丙烯 (PP) 探针上比在高表面能钢探针上表现出更好的粘附力。此外，为了提高用于压敏粘合剂 (PSA) 应用的 WPUU 的粘合性能，设计了双层系统。它们是使用两种具有不同粘弹性行为的 WPUU 制备的（一种更像固体，另一种，更像液体）以在粘弹性上产生梯度。这种策略导致粘合剂材料在使用钢探针进行探针粘性测量期间表现出原纤化，这是典型的 PSA。最后，由双层系统之一制备原型胶带。这些胶带在剥离测试中的表现与国内商用胶带类似，因此对潜在应用很有吸引力。